Diet mixers, such as low calorie tonic water, diet margarita mix and low calorie soda, spare calories but speed the rate that alcohol enters the bloodstream. High sugar liquids empty from the stomach more slowly than water or low calorie drinks.
Diet mixers contain little or no sugar, so the alcohol in the drink leaves the stomach quickly and enters the bloodstream rapidly, which makes you drunk faster. Australians researchers, using ultrasound, measure the rate that drinks containing diet or normal mixers emptied from the stomach.
Drinks using diet mixers left the gut 15 minutes sooner and caused nearly 50% higher blood alcohol levels. Women should be particularly care using diet mixers. Consuming the same number of drinks, blood alcohol increased more in women then in men. Also, women are more likely to use diet mixers.